Preheat oven to 450°F. In a medium bowl, combine the first three cheeses with the fresh herbs; mix well and set aside. Lightly brush the olive oil over the crust. With a teaspoon, drop the cheese mixture evenly over the crust and then scatter the tomatoes over the cheese. Season with pepper to taste and top with Mozzarella cheese. Bake 15 to 20 minutes. Let rest 5 minutes or more before cutting.